Whatman quantitative filters are designed for gravimetric analysis and the preparation of sample for instrumental analysis. Hardened filter papers with 0.015% ash maximum are treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Buchner filtration where the tough surface of the filter makes it easy to recover precipitates. All hardened papers are sold as packs of 100.
Grade 54 (22µm)
Very fast filtration for use with coarse or gelatinous precipitates. High wet strength makes this grade very suitable for vacuum assisted fast filtration of difficult coarse or gelatinous precipitates.
To help you choose the right filter for your application please click on the image below that will take you to the application guide for:
         
 There is also a link to the Cytiva Filter Paper Selector Guide
How do you choose the right size filter paper for your funnel? Use the table below to see what size filter paper you should use Gravity filtration using a filter paper inside a filtration funnel is used to remove precipitates from a liquid. The remaining liquid is known as the filtrate. For standard shaped filter funnels where the walls are at 58 or 60° the table below shows the r...
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